SWAPON(8) Linux Programmer's Manual SWAPON(8)
NAME
swapon, swapoff - enable/disable devices and files for
paging and swapping
SYNOPSIS/sbin/swapon[-h-V]/sbin/swapon-a[-v]/sbin/swapon[-v][-ppriority]specialfile.../sbin/swapon[-s]/sbin/swapoff[-h-V]/sbin/swapoff-a/sbin/swapoffspecialfile...DESCRIPTIONSwapon is used to specify devices on which paging and
swapping are to take place. Calls to swapon normally
occur in the system multi-user initialization file /etc/rc
making all swap devices available, so that the paging and
swapping activity is interleaved across several devices
and files.
Normally, the first form is used:
-h Provide help
-V Display version
-s Display swap usage summary by device. This option
is only available if /proc/swaps exists (probably
not before kernel 2.1.25).
-a All devices marked as ``sw'' swap devices in
/etc/fstab are made available.
-ppriority
Specify priority for swapon. This option is only
available if swapon was compiled under and is used
under a 1.3.2 or later kernel. priority is a value
between 0 and 32767. See swapon(2) for a full
description of swap priorities. Add pri=value to
the option field of /etc/fstab for use with swapon-a.
Swapoff disables swapping on the specified devices and
files, or on all swap entries in /etc/fstab when the -a
flag is given.
NOTE
You should not use swapon on a file with holes.
SEEALSOswapon(2), swapoff(2), fstab(5), init(8), mkswap(8),
rc(8), mount(8)
FILES/dev/hd?? standard paging devices
/dev/sd?? standard (SCSI) paging devices
/etc/fstab ascii filesystem description table
HISTORY
The swapon command appeared in 4.0BSD.
Linux 1.x 25 September 1995 1